---
cve: "CVE-2026-62247"
severity: "MEDIUM"
cvss: 6.5
epss: "5.2%"
vendor: "supabase"
kev: false
exploited: false
published: "2026-09-21 20:17:27"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T05:30:48+02:00"
---

# CVE-2026-62247

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

Supabase Realtime provides Broadcast, Presence, and Postgres Changes via WebSockets. Prior to 2.111.2, Realtime authorization does not correctly honor the per-extension presence.read row-level security policy when a private-channel client is allowed presence.write but explicitly denied presence.read. Under that differential policy, the client can receive presence_diff messages containing other members' presence metadata, including application-defined location, online-status, roster, viewing, or typing information. Deployments with uniform presence visibility have no differential, and postgres_changes row data is unaffected. This issue is fixed in version 2.111.2.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Referenzen

- <https://github.com/supabase/realtime/security/advisories/GHSA-rcr8-2525-4r7p>
- <https://github.com/supabase/realtime/pull/1969>
- <https://github.com/supabase/realtime/commit/c039bca9b57c2e554a67fdf462970b54641d82eb>
- <https://github.com/supabase/realtime/releases/tag/v2.111.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-62247) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_